JPH0458677U

JPH0458677U -

Info

Publication number: JPH0458677U
Application number: JP10167390U
Authority: JP
Priority date: 1990-09-28
Filing date: 1990-09-28
Publication date: 1992-05-20

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図は同実施例のスプリングホルダを示す正面図、
第３図は同スプリングホルダの平面図、第４図は
同実施例のオイルポンプカバーの底面を示す部分
図、第５図は第４図の−線における断面図、
第６図は従来例を示す平面図、第７図は第６図の
−線における断面図である。１４……リリーフ弁、６……ボール（弁体）、
１７……スプリングホルダ、１７Ａ……頭部、１
７ｂ，１７ｂ′……座面（係合面）、１８……ス
プリング、１９……弁口、２０……オイルポンプ
カバー（カバー）、２０ｂ，２０ｂ′……座面（
係合面）、ａ，ａ′……段差。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a front view showing the spring holder of the same example.
FIG. 3 is a plan view of the same spring holder, FIG. 4 is a partial view showing the bottom surface of the oil pump cover of the same embodiment, and FIG. 5 is a sectional view taken along the - line in FIG. 4.
FIG. 6 is a plan view showing a conventional example, and FIG. 7 is a sectional view taken along the - line in FIG. 14... Relief valve, 6... Ball (valve body),
17...Spring holder, 17A...Head, 1
7b, 17b'... Seat surface (engaging surface), 18... Spring, 19... Valve port, 20... Oil pump cover (cover), 20b, 20b'... Seat surface (
engagement surface), a, a'... level difference.

Claims

[Scope of Claim for Utility Model Registration] A valve body that freely opens and closes a valve port communicating with the discharge port of an oil pump, a spring that biases this valve body in a direction to close the valve port, and a spring that biases this valve body in a direction to close the valve body. A relief valve for an oil pump having a spring holder held between the spring holder and a cover through which the head of the spring holder passes and which locks the spring holder in an irremovable manner, the through-hole through which the spring holder of the cover passes. An engagement surface having at least one step on the inside is formed on the inner circumference of the spring holder, and engages with the engagement surface of the cover on the outer circumference of the inner end of the spring holder and corresponds to the step of the engagement surface of the cover. An engagement surface with a step is formed, and the engagement between the engagement surface of the spring holder and the cover can be switched to engagement between other engagement surfaces with different steps by rotating the spring holder. An oil pump relief pressure switching device that is characterized by a smooth curve.